lsm6dsox: Add missing time import.

Driver calls time.sleep_ms() in one place.

Found by Ruff checking F821.

Signed-off-by: Angus Gratton <angus@redyak.com.au>

micropython/drivers/imu/lsm6dsox/lsm6dsox.py

@@ -46,6 +46,7 @@ while (True):
 
 import array
 from micropython import const
+import time
 
 _CTRL3_C = const(0x12)
 _CTRL1_XL = const(0x10)